I've been using Fossil as my own personal knowledge repository for a few months, and it's been wildly successful.

It's pretty much Gitea in a single SQLite file (Wiki, tickets, version control, etc.). It's weird, but you can edit all of these things off-line and then sync everything back. `fossil ui` hosting the server for my docs locally, and from my home server is super useful and easy.

Some of the commands are super weird though, but I put them my homepage of my fossil docs :) The auto-sync feature helps since I work on multiple computers to help ensure that I don't get too far out of sync.